Adding-machine.



N 7 ,431. PATENTED 'AUG. 23, 1904.

' H. G. DUNGAN.

ADDING MACHINE.

APPLICATION FILED APR. 21, 1903.

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No. 768,431. PATENTED AUG. 23,1994. H. G. DUNGAN. ADDING MACHINE.

APPLIOATION FILED APR. 21, 1903.

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APPLIUATION FILED APR. 21, 1903.

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HARRY C. DUNGAN,

Patented August 23, 1904.

PATENT OFFICE.

OF JACKSON, OHIO.

ADDING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 768,431, dated. August23, 1904.

Application filed April 21, 1903- To all whom it may concern:

Be it known that I, HARRY'O. DUNGAN, a citizen of the United States, anda resident of Jackson, in the county of Jackson and State of Ohio, havemade a certain new and useful Invention in AddingJIachines; and Ideclare the following to be a full, clear, and exact description of thesame, such as will enable others skilled in the art to which itappertains to make and use the invention, reference being had to theaccompanying drawings, and to letters and figures of reference markedthereon, which form a part of this specification.

Figure 1 is a vertical section through the type-writer and itsattachment. Fig. 2 is a plan view of the invention as applied with coverremoved and parts broken away. Fig. 3 is a front view of the inventionas applied withparts in section and broken away. Fig. 4 is a detailperspective view illustrating the operation of the slide and itsconnections.

The invention relates to adding-machines chiefly designed as attachmentsto typewriters; and it consists in the novel construction andcombinations of devices, as hereinafter set forth.

In the accompanying drawings, illustrating the invention applied to amachine of the Remington type, the construction shown is designed to beused in connection with a typewriter having vert-ically-alined rotaryshafts to which are connected by crank-arms the keys of the machine andthe type-bar connections.

The shafts c, which are operated for the numerals l, 2, 3, 4L, 5, 6, 7,8, and 9, have rearward extensions (Z through the back part of the frame6 of the type-writer, and each of these extensions is provided with alaterally-extending adjustable crank-arm it. Each of these arms it isprovided with a sleeve-bearing f, whereby it is connected to thejournal, and a set-screw gin said sleeve-bearing serves to hold the armsecurely in position after the adjustment of the arm. The crankextensions may vary in length for convenience in attaching the crankarms7L, and these arms are of various lengths Serial No. 153,682. (Nomodel.)

to suitthe'positions of the rotary shafts c in the type-writer frame intheir relation to the slide 7c, which moves in a fixed guideway Z, whichforms a part of the back of the attachment-frame 21. The slide 70 isprovided with notches m in its lower portion, these notches beingabruptly shouldered at their lower ends and being gradually cut outabove such shoulders to accommodate the movements of the arms it whenthey are put in motion by the operation of the numeral-keys. hen anumeral-key is struck, the rotary shaft correspon ding thereto andhaving a crank-arm connection it therewith turns, and its arm 7t,engaging the notch m of the slide Zr, draws the latter downward adistance whichis proportionate to the number of the key which is struck,the slide 70 being returned to normal position by spring 70. To theslide k is connected a rod n, which is attached to a pawllever p,whichis journaled on a shaft q, carrying a large toothed wheel 9*,lying in aplane extending longitudinally of the machine, and which is loose onsaid shaft and is designed to move that one of a series of toothedwheels 8 which is at the time in engagement therewith. The series oftoothed wheels 8 is laterally movable with reference to the largetoothed wheel ygand to this end these toothed wheels .9 are mounted in amovable frame 25, the motion of which is governed by the motion of thetype-writer carriage. To the large toothed wheel is attached aratchet-wheel a, which is fixed on the shaft 1 and is provided withteeth corresponding to the teeth of said large toothed wheel. When anumeral key is operated, drawing down. the slide 7c, the pawl-lever 1)connected thereto turns the large wheel 9 a distance proportionate tothe number of said numeral-key, and said large wheel turns thecorresponding toothed wheel 8 of the series sufficiently to move theindicator-disk o, which is attached thereto, the proper distance toeffect'the addition of the number in the general indication, which iseffected by the series of indicator-disks in their incasement w, whichis provided with a sight-slot y. A spring-de tent .2 serves to hold thelarge toothed wheel in the position to which it has been turned by theoperation of the pawl-lever. Vhen the numeral-key is released, the slideit is raised to normal position by the spring 1%.

In ordinary machines of the character indicated the numeral-keys arelocated laterally in banks of four on each side, with the exception ofthe numeral-key 1, which is toward the middle of the arrangement. It isdesigned, therefore, to provide a slide/ c on each side of theattachment-frame and to connect these slides by a transverse bar 12, towhichis connected the arm it of the extension (Z of the rotary shaftcorresponding to this primenumeral.

At or near a level with the type-Writer carriage 22 is provided in rearof said carriage on the attachment-frame a small carriage 13, which isdesigned to run on ball-bearings or on rollers, as at 14.. This carriageis provided with the indicator, which is similar in so far as regardsits toothed Wheels and indicator-disks to those of ordinarynumberingmachines, consisting of eight disks, more or less, eachprovided with the usual peripheral numbering O, 1, 2, 3, 4:, 5, 6, 7, 8,and 9, adapted to show through the sightslot of the incasement. Thesedisks are provided with carrying-teeth or projections in the usualmanner in such wise that when one of saiddisks is turned through acomplete revolution it will move the wheel to its left one-tenth of itsrevolutions or the distance from one of its peripheral numbers to thenext.

The indicator-carriage 13 is connected to the type-writer carriage 22 byan arrangement of racks and pinions, as follows: The frame of theattachment is provided with a journalbearing 15, through which extends ashaft 16, carrying at one end a pinion 17, engaging a rack 18', attachedto the type-writer carriage, and at its other end a pinion 19, engaginga rack 20, attached to the indicator-carriage. Usually the latter pinionis of larger diameter than the type-writer pinion in order that thespacing in the motion of the indicatorcarriage shall be on a largerscale. The rack of the type-writer carriage is short and is arrangednear its end in order that it shall not engage its pinion until it hasneared its end of its writing-line. When, however, it is near such end,it engages the pinion and moves the indicator-carriage.

To each disk of the indicator is attached a toothed Wheel .9 of theseries hereinbefore referred to, these wheels having teeth of propersize to engage the large toothed Wheel 7*.

When the type-writer carriage has moved the indicator-carriage to apointwhere one of the toothed wheels s of the indicator engages the largetoothed wheel 1', then if any numl ber be struck the rotary shaft ofsuch number through the extension arm, slide, and pawl-lever, will causethe large toothed wheel 9' to rotate a distance proportionate to thenumber which is struck, and such large toothed wheel Will in turn movethe indicator-wheel with which it is then in engagement a correspondingnumber of teeth, registering that number or adding such number toany'previous number already registered, and when the type-writer key isreleased the type-writer carriage in moving forward one space will carrythe indicator-carriage and its indicator forward a proportionatedistance, so that the toothed wheel of the next indicator-disk willengage the large toothed wheel 0 in readiness for the next number to beadded.

In the series of indicator-disks an. interval equivalent to the spacewhich is occupied by one of the numbered disks is provided between thesecond and third Wheels from the right of the series in order to allowfor the period or point interval between the whole numbers and thedecimals, the devices for carrying between such wheels being, however,upon the same principle as that between the other wheels of the series.

The machine will be found useful in making invoices, stock-numbering,and similar work, as prices and amounts may be written and numbers usedin the body of the writing without conflicting with the work of theadding attachment, which does not come into operation until the carriageof the type-writer has moved a sufiicient distance from right to left toconnect with the small pinion 17. When that point is reached, however,if a figure be struck it will register the number on theadding-indicator.

The connections may be readily varied for type-writers of differentconstructions.

Having described this invention, what I claim, and desire to secure byLetters Patent, 1s-

1. In an adding-machine, the combination of a longitudinal spur-wheel,transverselymovable indicating-Wheels havingspur-wheels upon the shaftthereof and adapted to be moved successively into engagement with saidlongitudinal spur-wheel, a vertically-reciprocatory carriage having anoperating connection with said longitudinal spur-wheel, the dependingnotched arms of said carriage, vertically-alined lateral rotary shaftsand a central rotary shaft having cranks engaging said notched arms, thevertical longitudinal banks of number-keys at each side of the machineand a central number-key having crank connections with said rotaryshafts, and means for returning the carriage to raised position,substantially as specified.

2. In an adding-machine, the combination of a stationary spur-wheel,transversely-movable indicating-wheels adapted to be moved successivelyin engagement With said stationary Wheel, a vertically-reciprocatorycarriage having an operating connection With said stationary Wheel, thedepending notched arms of said carriage, rotary shafts having cranksengagingsaid notched arms, the number-keys having crank connections withsaid rotary shafts, and means for returning the carriage to raisedposition, substantially as specified.

In testimony whereof I afiix my signature in presence of two Witnesses.

HARRY C. DUNGAN. Witnesses:

G. A. SLoAN, JosErH MCGHEE.

